BT (or similar) may stand for:

  • Baal teshuva, a term that often refers to a Jew who turns to embrace Orthodox Judaism
  • Babylonian Talmud, a central text in Judaism (sometimes abbreviated as TB, Talmud Bavli, Babylonian Talmud in Hebrew)
  • Bacillus thuringiensis, a bacterium which forms Bt toxins, used as insecticides (BT powder).
  • Baronet, a title in the British honours system abbreviated Bt
  • Bathythermograph, a device used to obtain a record of temperature against depth in the ocean
  • Betéti társaság: a limited partnership, a type of business entity in Hungary, with at least one general partner and one limited partner; usually abbreviated Bt.
  • Body thetan, part of Scientology doctrine
  • Brevet (military), a military term sometimes abbreviated Bt (although more often Bvt)
  • BT tank, any of a series of Soviet military tanks

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